This head tracker adopts geomagnetic sensor, compare with conventional gyro, it is more accurate and no drift. Specifications: Weight: 10g（not include the cables) Dimension: 40*28*7mm Power supply: powered from transmitter trainer port (such as Futaba 9 to 12-channel transmitters square trainer port) Packing method: bare PCB, no outer case/packing Sensor type: Geomagnetic sensor, 3-axis Includes: 1* Geomagnetic Head Tracker 1* Cable Requires: 1*2.4G / 5.8G video transmitter 1*Video camera 1*Earphone Hint: The transmitter must has trainer port to work with this device, also as this device need a spare channel, so the transmitter should be no less
head tracking
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